17 April 2025

• curprev 23:3123:31, 17 April 2025 Jb2015007 talk contribs 4,350 bytes −11 →Solution 5 (Linearity of Expectation)
• curprev 23:3023:30, 17 April 2025 Jb2015007 talk contribs 4,361 bytes −12 →Solution 5 (Linearity of Expectation)
• curprev 23:2923:29, 17 April 2025 Jb2015007 talk contribs 4,373 bytes +27 →Solution 5 (Linearity of Expectation)
• curprev 23:2823:28, 17 April 2025 Jb2015007 talk contribs 4,346 bytes +1,078 →Solution 4

27 August 2021

• curprev 12:5412:54, 27 August 2021 Yk2007 talk contribs 3,268 bytes +716 →Solution 3

18 July 2021

• curprev 11:0411:04, 18 July 2021 Mobius247 talk contribs 2,552 bytes +31 →Solution 1

4 August 2020

• curprev 09:1309:13, 4 August 2020 Savannahsolver talk contribs 2,521 bytes +66 No edit summary

13 July 2020

• curprev 16:5616:56, 13 July 2020 Gr8song talk contribs m 2,455 bytes −30 Fixed headers

11 April 2020

• curprev 01:3701:37, 11 April 2020 Jacobabraham13 talk contribs m 2,485 bytes −1 →Solution 2
• curprev 01:3701:37, 11 April 2020 Jacobabraham13 talk contribs 2,486 bytes 0 →Solution 2
• curprev 01:3601:36, 11 April 2020 Jacobabraham13 talk contribs m 2,486 bytes +8 →Solution 2
• curprev 01:3301:33, 11 April 2020 Jacobabraham13 talk contribs m 2,478 bytes +18 →Solution 2

3 February 2020

• curprev 21:2421:24, 3 February 2020 Lcz talk contribs 2,460 bytes +254 →Solution 2

6 January 2019

• curprev 19:0519:05, 6 January 2019 Firebolt360 talk contribs 2,206 bytes −1,137 →Solution 2
• curprev 19:0419:04, 6 January 2019 Firebolt360 talk contribs 3,343 bytes +1,138 →Solution 1
• curprev 19:0119:01, 6 January 2019 Firebolt360 talk contribs 2,205 bytes +1,457 →Solution

1 January 2016

• curprev 10:5910:59, 1 January 2016 Ghghghghghghghgh talk contribs 748 bytes +78 →Solution

4 March 2015

• curprev 18:0618:06, 4 March 2015 DPER2002 talk contribs 670 bytes +1 No edit summary
• curprev 18:0518:05, 4 March 2015 DPER2002 talk contribs 669 bytes +75 No edit summary
• curprev 18:0318:03, 4 March 2015 DPER2002 talk contribs 594 bytes +594 Created page with "==Problem== Johann has <math>64</math> fair coins. He flips all the coins. Any coin that lands on tails is tossed again. Coins that land on tails on the second toss are tossed..."